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Related Concept Videos

MOS Capacitor01:25

MOS Capacitor

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A Metal-Oxide-Semiconductor (MOS) capacitor is a fundamental structure used extensively in semiconductor device technology, particularly in the fabrication of integrated circuits and MOSFETs (metal-oxide-semiconductor field-effect transistors). The MOS capacitor consists of three layers: a metal gate, a dielectric oxide, and a semiconductor substrate.
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When an archer pulls the string in a bow, he saves the work done in the form of elastic potential energy. When he releases the string, the potential energy is released as kinetic energy of the arrow. A capacitor works on the same principle in which the work done is saved as electric potential energy. The potential energy (UC) could be calculated by measuring the work done (W) to charge the capacitor.
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Energy Stored in Capacitors01:10

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A parallel plate capacitor, when connected to a battery, develops a potential difference across its plates. This potential difference is key to the operation of the capacitor, as it determines how much electrical energy the capacitor can store.
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In 1749, Benjamin Franklin coined the word battery for a series of capacitors connected to store energy. Capacitors store electric potential energy that can be released over a short time. This property means capacitors have a wide range of applications.
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A device consisting of two electrical conductors that are separated by a distance and used to store electrical charges is called a capacitor. The space between the conductors is either a vacuum or an insulating material, called a dielectric. Capacitors have many applications, ranging from filtering static from radio reception to energy storage in heart defibrillators.
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Capacitors play a crucial role in car radios, where they filter and store frequencies to ensure clear signal reception. Essentially serving as energy storage devices, capacitors store energy within their electric field and are composed of two parallel conducting plates separated by a dielectric.
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High-Voltage MXene-Based Supercapacitors: Present Status and Future Perspectives.

Yuanyuan Zhu1,2, Jiaxin Ma1,3, Pratteek Das1

  • 1State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, 116023, China.

Small Methods
|January 27, 2023
PubMed
Summary
This summary is machine-generated.

Researchers explore strategies to increase the working voltage of MXene-based supercapacitors (SCs). This involves optimizing electrolytes and material modifications to overcome limitations and enhance energy density for next-generation energy storage devices.

Keywords:
MXene-based supercapacitorsMXeneselectrolytesenergy storagehigh voltage

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Area of Science:

  • Materials Science
  • Electrochemistry
  • Energy Storage

Background:

  • MXene, a 2D material class, shows promise for supercapacitors (SCs).
  • Current MXene-based SCs have limited working voltage (≤ 0.6 V) due to electrode oxidation and electrolyte decomposition.
  • This limitation restricts the energy density of MXene-based devices.

Purpose of the Study:

  • To provide a comprehensive overview of strategies for enhancing the operating voltage of MXene-based SCs.
  • To discuss the impact of electrolytes, device configuration, and material modification on voltage windows.
  • To explore future perspectives for high-voltage MXene-based SCs.

Main Methods:

  • Systematic discussion of electrolyte effects (aqueous, organic, ionic liquid).
  • Analysis of asymmetric device configurations.
  • Review of material modification techniques.
  • Investigation of high-voltage mechanisms.

Main Results:

  • Identified key factors influencing the operating voltage of MXene-based SCs.
  • Highlighted advances in electrolyte design and structure regulation.
  • Provided insights into mechanisms enabling higher operating voltages.

Conclusions:

  • Overcoming voltage limitations is crucial for improving MXene-based SC energy density.
  • Tailoring electrolytes and materials is essential for high-voltage SC development.
  • Future research should focus on rational design of advanced electrodes and electrolytes.